"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : 兼容性-alter table语句删除主键
Case Name   : 开启2个会话，事务中执行删除主键操作
Create At   : 2022.10.27
Owner       : z@wan005
Description :
    1、创建兼容b类型数据库
    2、创建表
    3、开启事务，删除主键
    4、线程2再次插入主键列重复值
    5、清理环境
Expect      :
    1、成功
    2、创建成功
    3、成功
    4、会话1事务未提交插入数据阻塞，待会话1提交事务后，会话2插入数据成功
    5、清理环境成功
History     :
"""

import os
import time
import unittest

from testcase.utils.ComThread import ComThread
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.Logger import Logger


class Compatibility(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.constant = Constant()
        self.db_name = 'db_alter_0044'
        self.t_name = 't_alter_0044'

    def test_alter_table(self):
        step1_txt = '----step1: 创建兼容b类型数据库，expect: 成功----'
        self.log.info(step1_txt)
        sql1 = f"drop database if exists {self.db_name};" \
               f"create database {self.db_name} dbcompatibility 'b';"
        msg1 = self.pri_sh.execut_db_sql(sql1)
        self.log.info(msg1)
        self.assertIn(self.constant.CREATE_DATABASE_SUCCESS, msg1,
                      '执行失败:' + step1_txt)

        step2_txt = '----step2: 创建表，expect: 创建成功----'
        self.log.info(step2_txt)
        sql2 = f"drop table if exists {self.t_name};" \
               f"create  table {self.t_name}(id int primary key, sex text);" \
               f"insert into {self.t_name} values(1,'man');"
        msg2 = self.pri_sh.execut_db_sql(sql2, dbname=self.db_name)
        self.log.info(msg2)
        self.assertIn(self.constant.TABLE_CREATE_SUCCESS, msg2,
                      '执行失败:' + step2_txt)
        self.assertIn(self.constant.INSERT_SUCCESS_MSG, msg2,
                      '执行失败:' + step2_txt)

        step3_txt = '----step3: 开启事务，删除主键;expect:成功----'
        self.log.info(step3_txt)
        sql_cmd1 = f'start transaction;' \
                   f'alter table {self.t_name} drop primary key;' \
                   f'select pg_sleep(10);' \
                   f'commit;'
        session1 = ComThread(self.pri_sh.execut_db_sql,
                             args=(sql_cmd1, '', self.db_name))
        session1.setDaemon(True)
        session1.start()
        time.sleep(3)

        step4_txt = '----step4: 线程2再次插入主键列重复值，expect: 会话1事务未提' \
                    '交插入数据阻塞，待会话1提交事务后，会话2插入数据成功----'
        self.log.info(step4_txt)
        sql_cmd2 = f"insert into {self.t_name} values(1,'man');"
        session2 = ComThread(self.pri_sh.execut_db_sql,
                             args=(sql_cmd2, '', self.db_name))
        session2.setDaemon(True)
        session2.start()

        self.log.info("----session1执行结果----")
        session1.join(50)
        session1_result = session1.get_result()
        self.log.info(session1_result)
        self.assertIn('START TRANSACTION', session1_result,
                      '执行失败:' + step3_txt)
        self.assertIn('ALTER TABLE', session1_result,
                      '执行失败:' + step3_txt)
        self.assertIn('COMMIT', session1_result,
                      '执行失败:' + step3_txt)

        self.log.info("----session2执行结果----")
        session2.join(60)
        session2_result = session2.get_result()
        self.log.info(session2_result)
        self.assertIn('INSERT 0 1', session2_result,
                      '执行失败:' + step4_txt)

    def tearDown(self):
        step5_txt = '----step5: 删除数据库----'
        self.log.info(step5_txt)
        drop_sql = f'drop database if exists {self.db_name};'
        drop_result = self.pri_sh.execut_db_sql(drop_sql)
        self.log.info(drop_result)
        self.assertIn(self.constant.DROP_DATABASE_SUCCESS, drop_result,
                      "执行失败" + step5_txt)
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
